On this week's Fringe…
The Fringe teams seeks out Nina in order to find a way to communicate with Michael.
They learn that they need a special device in order to do so, as well as help from Nina's friend, Dr. Hastings.
Captain Windmark interrogates Hastings and discovers Nina's location. Before he can interrogate her about Michael and anything else important, she kills herself.
Olivia, Peter, and Walter get the tech that they need.
Walter is able to speak with Michael. He has flashbacks of his journey and discovers that Donald is September.